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The 6-cylinder models of the Valtra Valmet HiTech range introduced in the fall of 1998 mainly corresponded to the Mega 8050 series. As a SigmaPower model, the 8750 was replaced by the 8950 with 200 horsepower, which featured a Bosch inline pump instead of the Stanadyne distributor pump used in the smaller models.

The automation of the Delta Powershift transmission allowed programming of two automatic quick-shift programs, one for fieldwork and one for road use. The reverser was based on two wet multi-disc clutches. The reverse acceleration could be set to be faster or slower than the forward driving speed. The engagement of the quick shift was smoother than in the standard model thanks to sensors and automation. Also, the power take-off (PTO) engagement was controlled by the computer.

The reverser was mounted on the left side of the stalk. The clutch pedal was electrically operated, and a push-button clutch on the shift levers' knobs was standard. From the display on the right front pillar, the driver could see the quick shift stage, the selected direction, driving speed, and outside temperature. The lift device on all models was an Autocontrol D equipped with oscillation damping.

A new pneumatic Aires front suspension was available for the 6-cylinder HiTech models. This system, which differed from competitors', was justified by its functionality in extreme climatic conditions. The spring elements were two truck air springs and a shock absorber. The air was produced by a compressor, which could also be used for trailer brakes. The front axle was Dana, and for industrial models, Carraro.

In the fall of 2000, the HiTech 2.0 models were introduced. The automatic programs were updated. The most significant improvement was the user's ability to adjust the engine speeds used as transmission automation thresholds to suit each task. The four-wheel drive now engaged for a few seconds every time the tractor started moving or changed direction. When desired, starting out required only pressing the throttle after activating the Auto Traction function, and stopping was done by releasing the throttle or braking.

A new 135-horsepower low-rev model 8350 was introduced, with a nominal engine speed of 1800 rpm. The gear ratios corresponded to the 50 km/h version, but the top speed was limited to 40 km/h due to the lower engine speed. The noise level was specified as 73 dB. The 8350 featured an industrial front axle, as did the larger models.

In the 2003 model lineup, the 8050 and 8150 remained, now equipped with Bosch's electronic injection pump.

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